Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/57031

57031

ZIP 57031 is Gayville, South Dakota, mostly in Yankton County; area code 605; Central time.

Type
Standard
Time zone
America/Chicago
County
Yankton +1 more
Metro area
Yankton, SD
Population
784
Coordinates
42.8755, -97.1859
☼ Live from 57031 — Gayville, SD

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 57031 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 57031
  • 🔢 Type 57031 into a pocket calculator and turn it upside down: IEOLS — not quite a word, sorry.
  • ➕ As a number, 57,031 = 13 × 41 × 107. Its digits add up to 16, a total 1,922 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1101111011000111
  • 🏠 Its numerical neighbours: 57030 (Garretson, SD, 68 mi away) and 57032 (Harrisburg, SD, 46 mi away).
  • 🔄 Backwards, 57031 becomes 13075, which is not a ZIP code at all.
  • 👥 52 other ZIP codes are made of exactly the same digits (01375, 01537, 03751, 05731, 07513, 10537, …). The farthest-flung twin is 01537 in North Oxford, MA, 1,284 miles away.
  • 🧭 Farther north than 82% of all ZIP codes, and farther west than 74%.
  • 🎯223 miles north of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 57031 and you would come out at 42.88°S, 82.81°E — 749 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 21m of daylight. Shortest: 9h 01m.
  • 📏 At 39.4 square miles of land, 57031 is bigger than 53% of ZIP codes — room for about 30 Central Parks.
🌙 The sky over 57031 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population784This ZIP784
Households394This ZIP394
Housing units429This ZIP429
Median age42.6This ZIP42.6South Dakota38.0US 38.9
Median household income$64,794This ZIP$64,794South Dakota$75,081US $80,734
Median home value$137,100This ZIP$137,100South Dakota$257,400US $332,700
Median gross rent$602This ZIP$602South Dakota$946US $1,413
Bachelor's degree or higher13.9%This ZIP13.9%
Mean commute19.1 minThis ZIP19.1 min
Population density19.9 / sq miThis ZIP19.9 / sq mi

Business and tax activity

Business establishments8This ZIP8
Employees41This ZIP41
Annual payroll$2,509,000This ZIP$2,509,000
Tax returns filed320This ZIP320
Total adjusted gross income$24,589,000This ZIP$24,589,000

Land area

Land area39.36 sq miThis ZIP39.36 sq mi
Water area1.12 sq miThis ZIP1.12 sq mi

Counties 57031 spans

A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.

CountyShare of this ZIP
Yankton County 76.7%
Clay County 23.3%

Other place names in 57031

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 57031

ZIPCityDistance
68774 Saint Helena, NE 6.3 mi
57072 Volin, SD 7.9 mi
57046 Mission Hill, SD 8.3 mi
57069 Vermillion, SD 10.3 mi
68792 Wynot, NE 11.1 mi
57073 Wakonda, SD 11.2 mi
68736 Fordyce, NE 13.0 mi
57078 Yankton, SD 13.5 mi
57037 Irene, SD 16.1 mi
68751 Maskell, NE 16.5 mi

Find every ZIP code within 10 miles of 57031 →

Questions about this ZIP code

Where is ZIP code 57031?

57031 is in Gayville, South Dakota, in Yankton County, part of the Yankton, SD micropolitan area. Its published point location is 42.8755, -97.1859.

What county is 57031 in?

57031 spans 2 counties: Yankton County and Clay County. Most of it falls in Yankton County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.

What area code is 57031?

Gayville uses area code 605, from NANPA's telephone records.

What time zone is 57031 in?

57031 uses America/Chicago.

How many people live in 57031?

About 784 people live in ZIP code 57031, in 394 households, at 19.9 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 57031?

$64,794 a year, against $75,081 across South Dakota.

What ZIP codes are near 57031?

The closest are 68774 (6.3 mi), 57072 (7.9 mi), 57046 (8.3 mi), 57069 (10.3 mi) and 68792 (11.1 mi).

Is 57031 a PO Box ZIP code?

57031 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “57031 ZIP Code — Gayville, South Dakota (Yankton County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/57031

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/57031.json

Underlying data is public domain or openly licensed — sources, vintages and licences.